lingzi lu krystle campbell, martin richard and sean collier. the city has a long way to go. tonight, a big sigh relief. >> poppy, thank you very much indeed. let's go to cnn's jason carroll who has been in watertown. a lot of people, smiling people, replacing all the tension of the last few days. >> reporter: we did see that, piers. as each emergency vehicle pulled out they were met by neighbors who came out of their homes, applauded and cheered and honked their horns. if you look behind me you can see the flood lights are on their house, down the street. to the left of the corner there. you have police finishing up their work. all of this really -- please are thanking that one homeowner who came out of his house after he was on lockdown, saw something suspicious in his backyard. saw the glad on the boat, then looked closer, saw there was a bloody man inside. he went back to his house, he thun calls 911. emergency crews show up, the fbi, s.w.a.t., police are using their tech knowledge, helicopter, using infrared to get the exact location of the suspe suspect. then the fear s